import pytest
import sys
from unittest.mock import MagicMock, patch
from aare.common.beamline import MXBeamline
from aare.gui.gui import main

# We need to mock things that gui.py uses at module level or during startup
@patch("aare.gui.gui.QApplication")
@patch("aare.gui.gui.MainWindow")
@patch("aare.gui.gui.auth")
@patch("aare.gui.gui.mx_beamline")
def test_gui_main_startup(mock_mx, mock_auth, mock_win, mock_app):
    mock_mx.return_value = MXBeamline.X06DA
    mock_auth.return_value = "header.payload.signature"
    
    # Mock QApplication instance and its exec method
    mock_app_instance = mock_app.return_value
    mock_app_instance.exec.return_value = 0

    with patch("aare.gui.gui.QCommandLineParser") as mock_parser:
        # Simulate sys.argv
        with patch.object(sys, 'argv', ['gui.py']):
            try:
                main()
            except SystemExit:
                pass # Expected from sys.exit()

    mock_app.assert_called()
    mock_auth.assert_called()
    mock_win.assert_called()
    mock_win.return_value.show.assert_called()